fix control label font weight in Firefox
fix control label font weight in Firefox

nprapps/waterbug,nprapps/waterbug,scriptmediala/waterbug,nprapps/waterbug,nprapps/waterbug,claimsmall/waterbug,scriptmediala/waterbug,claimsmall/waterbug,claimsmall/waterbug,scriptmediala/waterbug,scriptmediala/waterbug,claimsmall/waterbug